JPH0441023Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention places a mounted object on a fixed frame on the vehicle body side via anti-vibration rubber, and inserts and tightens bolts across these three parts. This article relates to a vibration-proof support structure for a work vehicle equipped with a vehicle.

[Conventional technology]

BACKGROUND ART Conventionally, as shown in, for example, Japanese Utility Model Application No. 59-130111, objects to be mounted such as a cabin are sometimes mounted on a work vehicle such as a combine harvester. In order to reduce the vibration of the mounted object from the vehicle body as much as possible, the structure shown in Fig. 10 has conventionally been used to fix the mounted object on the fixed frame of the vehicle body. . That is, by interposing a cylindrical anti-vibration rubber 3 between a fixed frame 1 on the vehicle body side and a cabin 2, and inserting a bolt 4 through these three parts and tightening it with a nut 9, the anti-vibration rubber This is an expanded modification of 3.

[Problem that the invention attempts to solve]

However, with the conventional configuration, the cabin 2 is certainly supported with good cushioning against the vehicle body due to the elastic deformation of the vibration isolating rubber 3.
When the cabin 2 is subjected to large vertical vibrations, the vibration isolating rubber 3 is further deformed and the head 10 of the bolt 4 protrudes further downward from the lower surface of the fixed frame 1, and the restorability of the vibration isolating rubber 3 is then reduced. When the cabin 2 returned to its original state, the head 10 of the bolt 4 came into contact with the lower surface of the fixed frame 1, producing an abnormal sound, and the cabin 2 vibrated laterally with respect to the fixed frame 1. Even in such a case, the bolt 4 and the edge of the insertion hole 5 of the fixed frame 1 come into contact with each other, causing a noise problem in which a metallic sound is generated.

The present invention was developed with attention to the above-mentioned circumstances, and is a vibration-proof support structure for a working vehicle that supports the mounted object with good cushioning properties and does not generate noise due to contact between bolts and fixed frames. The purpose is to provide

[Means for Solving the Problems] That is, the characteristic configuration of the vibration-proof support structure for a work vehicle according to the present invention is that a thin-walled cylindrical portion that is inserted into a bolt insertion hole of a fixed frame is integrally connected with the vibration-proof rubber. However, when the bolt is tightened, the thin-walled cylindrical portion is expanded and deformed and is compressed between the lower surface of the frame and the large diameter portion provided below the bolt. The effects are as follows.

[Effect]

Due to the vertical vibration of the mounted object, the large diameter part of the bolt protrudes downward from the bottom surface of the fixed frame, and even if it returns to its original state, the thin cylindrical part will not be squeezed between the bottom surface of the frame and the large diameter part of the bolt. Since the bolt is interposed in a closed state, the large diameter portion of the bolt comes into contact with the thin-walled cylindrical portion. Also, even if the cabin swings laterally with respect to the vehicle body,
A thin cylinder of vibration-proof rubber is always interposed between the bolt and the edge of the insertion hole of the fixed frame.

[Effect of idea]

Therefore, the mounted object is mounted and supported on the vehicle body with a vibration-proof rubber interposed between the fixed frame and the mounted object, and the bolt and the fixed frame are connected while supporting the mounted object with good cushioning properties. It is now possible to provide a vibration-proof support structure for a working vehicle that does not generate abnormal noise upon contact.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 3 shows the front part of a DC type combine harvester as an example of a working vehicle. A reel 13 that scrapes the culms toward the rear of the vehicle body, a cutting force 14 that reaps the raked grain culms, an auger 15 that receives the reaped grain culms, collects them toward the center in the width direction of the vehicle body, and sends them out to the rear of the vehicle body. It is configured to include a reaping section 17 equipped with a conveyor 16 and the like for conveying to the rear of the vehicle body.

To explain the structure of the driving unit 12, as shown in FIG. The air sucked in from each dustproof net 18 provided at the side of the bonnet 19 by the drive is transferred to the dustproof net 18 provided at the rear of the bonnet 19.
It is designed to be ejected towards the rear of the aircraft after passing through. The bottom cover 22 is constructed by overlapping a dustproof net 24 on a bottom plate 23 made of a small-diameter hollow steel plate, as shown in FIG.
The structure is such that air can be sucked into the bonnet 19 not only from the sides of the bonnet 19 but also from the dustproof nets 24 on the bottom side, and as a result, air passes through each dustproof net 18 provided on the side of the bonnet 19. The wind speed is reduced, the dust clogging is reduced, and the dust that tends to accumulate on the top surface of the bottom cover 22 is sucked up by the fan 21 and discharged to the rear.

Next, the support structure of the cabin 2 will be explained.

A cabin 2 is mounted and supported at four corners of a fixed frame 1 on the side of a vehicle body, which is formed in a U-shaped cross section with an opening at the bottom, with vibration isolating rubber 3 interposed therebetween.

As shown in FIG. 1, the anti-vibration rubber 3 is formed by integrally extending a thin-walled cylindrical portion 6 from the bottom surface of an elastic cylindrical body 25. is inserted into the bolt insertion hole 5 drilled in the fixed frame 1 and placed on the upper surface of the fixed frame 1, and the main frame 26 of the cabin 2 is mounted on the upper surface of the vibration isolating rubber 3. .
The bolt 4 is inserted from the lower side of the fixed frame 1 through the through hole 5 of the fixed frame 1 and the inside of the cylinder of the vibration isolating rubber 3, and is inserted into the through hole 27 of the main frame 26, so that the bolt 4 protrudes from the main frame 26. By screwing the nut 9 onto the threaded portion 8 of the bolt 4, the bolt head 7 can be drawn toward the main frame 26.
A vibration isolating rubber 3 is clamped between the fixed frame 1 and the main frame 26 of the cabin 2. At that time, the thin-walled cylindrical portion 6 is expanded and deformed between the head 7 of the bolt 4 and the lower surface of the fixed frame 1, and is compressed between the fixed frame 1 and the head 7, as shown in FIG. It is becoming.

Therefore, due to the vertical vibration of the cabin 2, the bolt 4
Even if the head 7 is separated from the lower surface of the vibration-proof rubber 3 and returns to its original state and comes into contact with the lower surface of the thin-walled cylindrical portion 6, the elasticity of the thin-walled cylindrical portion 6 will cause a metallic sound. Since the thin-walled cylindrical portion 6 of the anti-vibration rubber 3 is always interposed between the bolt 4 and the opening edge of the insertion hole 5 of the fixed frame 1, the cabin 2 Even if the vehicle swings laterally with respect to the vehicle body, the bolts 4 and the fixed frame 1 will not come into contact and produce metallic sounds.

[Another example]

In the above embodiment, the head 7 of the bolt 4 was explained as the large diameter portion, but as shown in FIGS. 6 and 7, a washer is used as the large diameter portion 7, and the bolt 4 is connected to the main frame of the cabin 2. 26 and may be inserted into the fixed frame 1 side from above and tightened with a nut through the washer 7 on the lower surface side of the fixed frame 1. Furthermore, as shown in FIG. 8 and FIG.
By inserting it into the through hole 27 of the main frame 26 of the cabin 2, noise can be further reduced.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the anti-vibration support structure for a working vehicle according to the present invention, and FIGS. 1 and 2 are cross-sectional views showing a state in which anti-vibration rubber is interposed between a fixed frame and a mounted body, Fig. 3 is a side view of the front part of the DC combine harvester, Fig. 4 is a plan view of the inside of the driving section, Fig. 5 is a sectional view of the bottom cover, and Figs. 6 and 7 are another example of the vibration isolating rubber. FIG. 8 and FIG. 9 are explanatory diagrams for explaining the operation of yet another embodiment of the vibration isolating rubber, and FIG. 10 is a sectional view of a main part of a conventional example. 1... fixed frame, 2... mounted object, 3...
Anti-vibration rubber, 4... Bolt, 5... Bolt insertion hole,
6...Thin-walled cylindrical portion, 7...Large diameter portion.

Claims (1)

[Scope of utility model registration request] This is a vibration-proof support structure for a working vehicle, in which a mounted body 2 is placed on a fixed frame 1 on the vehicle body side via a vibration-proof rubber 3, and bolts 4 are inserted and tightened across these three parts. , a thin-walled cylindrical portion 6 inserted into the bolt insertion hole 5 of the fixed frame 1 is integrally connected to the vibration-proof rubber 3, and when the bolt 4 is tightened, the thin-walled cylindrical portion 6 is expanded and deformed and fixed. A vibration-proof support structure for a working vehicle configured to be compressed between the lower surface of a frame 1 and a large-diameter portion 7 provided below a bolt 4.